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A preparation method of rare earth ion-doped mgalon transparent ceramic material with ultraviolet filtering ability

A technology of rare earth ions and transparent ceramics, applied in the field of preparation of rare earth Ce3+/Eu2+ doped MgAlON transparent ceramics, achieving high mechanical strength, high optical transmittance, and simple process

Active Publication Date: 2017-09-29
武汉海凌汇智新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth mentioning that the current research is mainly based on glass substrates, that is to say, for ideal windows and transparent armor materials that can be used in harsh environments (space exploration and battlefields), such as sapphire and AlON, there is almost no direct research. Doping Rare Earth Ions to Obtain Ultraviolet Filtering Properties

Method used

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  • A preparation method of rare earth ion-doped mgalon transparent ceramic material with ultraviolet filtering ability
  • A preparation method of rare earth ion-doped mgalon transparent ceramic material with ultraviolet filtering ability
  • A preparation method of rare earth ion-doped mgalon transparent ceramic material with ultraviolet filtering ability

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Experimental program
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Embodiment 1

[0031] A preparation method of rare earth ion doped MgAlON transparent ceramic material with ultraviolet filtering ability, it comprises the steps:

[0032] 1) Weigh 99.8g of synthesized MgAlON (the mass ratio of its raw material to α-Al 2 O:AlN:MgO=76.45:18.53:5.02) and 0.2g Eu 2 o 3 Put the raw materials into the mixing tank according to the ball-to-material ratio of 4:1 and use absolute ethanol as the medium for ball milling and mixing, and obtain slurry (powder slurry) after ball milling for 24 hours;

[0033] 2) After the slurry is vacuum-dried, pass through a 200-mesh sieve to obtain a sieved powder;

[0034] 3) Weighing 2 g of the sieved powder and placing it in a steel mold, forming a ceramic green body with a diameter of about 20 mm and a thickness of about 4 mm at a pressure of 20 MPa, and obtaining a high-density ceramic green body after cold isostatic pressing at 200 MPa;

[0035] 4) The high-density ceramic body is placed in a pressure sintering furnace (high-t...

Embodiment 2

[0039] A preparation method of rare earth ion doped MgAlON transparent ceramic material with ultraviolet filtering ability, it comprises the steps:

[0040] 1) Weigh 98g of synthesized MgAlON (its raw material mass ratio α-Al 2 O: AlN: MgO = 80.36: 14.52: 5.12) ceramic powder and 2g Eu 2 o 3 Put the raw materials into the mixing tank according to the ball-to-material ratio of 3:1 and use absolute ethanol as the medium for ball milling and mixing, and obtain slurry (powder slurry) after ball milling for 24 hours;

[0041] 2) After the slurry is vacuum-dried, pass through a 200-mesh sieve to obtain a sieved powder;

[0042] 3) Weigh 2 g of the sieved powder and place it in a steel mold, and shape it into a ceramic green body with a diameter of about 20 mm and a thickness of about 3.7 mm at a pressure of 50 MPa, and obtain a high-density ceramic after 200 MPa cold isostatic pressing Body;

[0043] 4) The high-density ceramic body is placed in a high-temperature atmosphere fur...

Embodiment 3

[0047] A preparation method of rare earth ion doped MgAlON transparent ceramic material with ultraviolet filtering ability, it comprises the steps:

[0048] 1) Weigh 99.98g of synthesized MgAlON (the mass ratio of its raw material to α-Al 2 O:AlN:MgO=88.77:3.79:7.44) ceramic powder and 0.02g CeO 2 Put the raw materials into the mixing tank according to the ball-to-material ratio of 2:1 and use absolute ethanol as the medium for ball milling and mixing. After 24 hours of ball milling, the slurry is obtained.

[0049] 2) After the slurry is vacuum-dried, pass through a 200-mesh sieve;

[0050] 3) Weigh 2 g of the sieved powder and place it in a steel mold, and shape it into a ceramic green body with a diameter of about 20 mm and a thickness of about 4 mm at a pressure of 20 MPa, and obtain a high-density ceramic green body after cold isostatic pressing at 200 MPa ;

[0051] 4) The high-density ceramic body is placed in a high-temperature atmosphere furnace, filled with about ...

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Abstract

The present invention relates to a preparation method of ceramic material. A method for preparing a rare earth ion-doped MgAlON transparent ceramic material with ultraviolet filtration capability, characterized in that it comprises the following steps: 1) one or both of MgAlON and Eu 2 O 3 and CeO 2 are carried out in a mixture of arbitrary proportions Mixing and ball milling for 6 to 24 hours to obtain powder slurry; 2) Drying and sieving; 3) Axial pressure molding into a ceramic green body, and cold isostatic pressing; 4) The ceramic green body is placed in a pressure sintering furnace 5) Grinding and polishing to obtain a rare earth ion-doped MgAlON transparent ceramic material with high optical transmittance. The transparent ceramic material of the present invention has a certain ultraviolet absorption capacity, and has high optical transmittance in the visible light and infrared regions. This method is the first time to realize the regulation of ultraviolet transmittance by introducing rare earth ions in a transparent ceramic system, and the process is simple. It has broad application prospects in aerospace window materials and transparent armor applications.

Description

technical field [0001] The present invention relates to a kind of preparation method of ceramic material, particularly a kind of rare earth Ce 3+ / Eu 2+ The invention discloses a method for preparing transparent ceramics doped with MgAlON. The transparent ceramic material is suitable for preparing functional transparent ceramic windows and special transparent armor materials with short-wave ultraviolet filtering capabilities. Background technique [0002] MgAlON is a kind of MgO-Al 2 o 3 - A compound with a cubic spinel structure composed of AlN three-component system. Single-phase, sintered and dense polycrystalline MgAlON transparent ceramics have excellent thermal, optical and mechanical properties. The optical transmittance in the visible and infrared regions can reach 84%, the transmission range is 0.22-6.24μm, and the Vickers hardness is about It is 13.4GPa, and the bending strength can reach 274MPa. Its mechanical properties are significantly higher than that of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/58C04B35/622
Inventor 王皓刘鑫陈博文涂兵田王为民傅正义
Owner 武汉海凌汇智新材料有限公司